So I screwed up a concrete slab floor repair with sack concrete. I was smart enough to make sure all of the newly poured concrete was below the original floor level figuring I could top it with something prettier! I found this product. My first attempt was with one whole box, mixed in a 5 gallon bucket with the correct amount of water. MISTAKE. I had to spread it across a large area. By the time I was finished spreading it was beginning to firm up. Box says don't add more water, mix again. I did that and it bought me another 5 minutes or so then done. I rushed outside to clean up the tools. I let the bucket set up. When I was back inside i noticed some ridges, humps, and other high spots. I took my 2" scraper and shaved off the lumps, high spots, and other imperfections. It was like cutting through putty for another half hour, then too firm for more but I was in pretty good shape. The results were passable, not great. The finish was nice and smooth.I had more to do so I bought another box. This time I also bought some small 2.5 qt buckets. That made this go from frustration to a good product. I used a drill mixer, 1 qt (by volume) mix and 1/2 qt of water. Mix for a minute (it didn't splatter) and go. No rush, no panic, just enough to carefully spread around and make it look nice without setting up. Washed everything, mixed another batch, and pressed on. VERY good results when you aren't hurrying. I used this to fill in some old nail divots from carpet tack strip and the floor is smooth, even, and looks nice. It sets in a hurry, which is good, because 30 minutes later I put on another coat where it was needed.I recommend this product with the following cautions: Mix small batches and have everything ready to go.
Difficult to Install